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\begin {document} 


\begin{center} 
\begin{tikzpicture}[scale=0.78]\begin{axis}[
ylabel=Mood (Biennial),
xlabel=Year (First of Biennium),
% remove comma in xticklabels
xticklabels={},
extra x ticks={1955, 1963, 1969},
extra x tick labels={1955, 1963, 1969},
% one tick every year
xtick distance=1
]
\addplot table {
Date Index
1955	61. 694
1957 63.766
1959 66.572
1961 68.908
1963 65.876
1965 65.244
1967 63.129
1969  56.962

};
% if you have the file, you can do
% \addplot table {datafile.csv};
\end{axis}
\end{tikzpicture}
\captionof*{figure}{\textbf{Figure 1OA: Stimson's Policy Mood Index 1955-1970}}
\vspace{7mm} 

\begin{tikzpicture}[scale=0.78]
\begin{axis}[
ylabel=Average Mood,
xlabel= Electoral Term,
% remove comma in xticklabels
xticklabels={},
extra x ticks={1957, 1961, 1965},
extra x tick labels={1957-60, 1961-4, 1965-8},
% one tick every year
xtick distance=1
]
\addplot table {
Date Index
1957	 65.169
1961	 67. 392
1965  64.1865
};
% if you have the file, you can do
% \addplot table {datafile.csv};
\end{axis}
\end{tikzpicture}
\captionof*{figure}{\textbf{Figure 1OB:  Electoral-Term Average Stimson's Policy Mood Index }}
\end{center} 
\end{document} 